1885492 - Handling of HTML-Mailto-Forms with Thunderbird on Linux

Status: UNCONFIRMED

(Core :: DOM: Forms, defect)

Description

[sven.glueckspilz]

Attachment: Screenshot_Mailto-Thunderbird.jpg

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:124.0) Gecko/20100101 Firefox/124.0

Steps to reproduce:

1. Created an standard HTML file with form:

<form action="mailto:[e-mail]" enctype="text/plain" method="get">
<div>
<label for="subject">Betreff</label>
<input type="text" name="subject" id="subject" placeholder="Betreff">
</div>
<div>
<label for="message">Nachricht</label>
<textarea name="body" id="body" cols="30" rows="10" placeholder=""Ihre Nachricht></textarea>
</div>
<div>
<button type="reset">Löschen</button>
<button type="submit" >Absenden</button>
</div>
</form>

2. Opened the file in Firefox DEV Edition
3. Filled out form with spacec in subject and a few linebreaks and spaces in body
4. Clicked on Submit

Actual results:

Thunderbird openend, schowed new email form and filled in subject and message body. Original pace characters were replaced by + characters

Expected results:

Space characters should show up as spaces, not as +.
Works well e.g. in Chromium wit the same form and same OS/Thunderbird.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::DOM: Forms' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Sean Feng [:sefeng]]

I just tested out in Chromium and it also replaces spaces with "+" for me. I wonder if this replaces to settings of clipboard or something.

Edgar, do you know why this happens?

Comment 3

[Edgar Chen [:edgar] (Parental leave until Oct. 09.)]

Attachment: test.html

Comment 4

[Edgar Chen [:edgar] (Parental leave until Oct. 09.)]

This is about form submission and application/x-www-form-urlencoded serializer: https://url.spec.whatwg.org/#string-percent-encode-after-encoding replaces U+0020 (SP) with U+002B (+), and then https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#submit-mailto-headers replaces U+002B (+) with U+0020 (SP) back. But I wonder if any browser replaces them back when submitting mailto as I also tested Chromium/Safari with Mail.app on macOS, they also replace space with "+".